libgcrypt: Import libgcrypt 1.11

We currently use an old version of libgcrypt which results in us having
fewer ciphers and missing on many other improvements.

Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

grub-core/lib/libgcrypt/mpi/mpi-internal.h

@@ -15,8 +15,8 @@
  * GNU Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ * License along with this program; if not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  *
  * Note: This code is heavily based on the GNU MP Library.
  *	 Actually it's the same code with only minor changes in the
@@ -50,6 +50,7 @@
 #endif /*BITS_PER_MPI_LIMB*/
 
 #include "mpi.h"
+#include "const-time.h"
 
 /* If KARATSUBA_THRESHOLD is not already defined, define it to a
  * value which is good on most machines.  */
@@ -79,6 +80,11 @@ typedef int mpi_size_t;        /* (must be a signed type) */
 	if( (a)->alloced < (b) )   \
 	    mpi_resize((a), (b));  \
     } while(0)
+#define RESIZE_AND_CLEAR_IF_NEEDED(a,b) \
+    do {			   \
+	if( (a)->nlimbs < (b) )   \
+	    mpi_resize((a), (b));  \
+    } while(0)
 
 /* Copy N limbs from S to D.  */
 #define MPN_COPY( d, s, n) \
@@ -92,7 +98,7 @@ typedef int mpi_size_t;        /* (must be a signed type) */
     do {				\
 	mpi_size_t _i;			\
 	for( _i = 0; _i < (n); _i++ )	\
-	    (d)[_i] = (d)[_i];		\
+	    (d)[_i] = (s)[_i];		\
     } while (0)
 
 #define MPN_COPY_DECR( d, s, n ) \
@@ -134,7 +140,7 @@ typedef int mpi_size_t;        /* (must be a signed type) */
 	    mul_n_basecase (prodp, up, vp, size);	\
 	else						\
 	    mul_n (prodp, up, vp, size, tspace);	\
-    } while (0);
+    } while (0)
 
 
 /* Divide the two-limb number in (NH,,NL) by D, with DI being the largest
@@ -145,7 +151,8 @@ typedef int mpi_size_t;        /* (must be a signed type) */
  */
 #define UDIV_QRNND_PREINV(q, r, nh, nl, d, di) \
     do {							    \
-	mpi_limb_t _q, _ql, _r; 				    \
+        mpi_limb_t _ql GCC_ATTR_UNUSED;                               \
+	mpi_limb_t _q, _r;                                          \
 	mpi_limb_t _xh, _xl;					    \
 	umul_ppmm (_q, _ql, (nh), (di));			    \
 	_q += (nh);	/* DI is 2**BITS_PER_MPI_LIMB too small */  \
@@ -253,6 +260,49 @@ mpi_limb_t _gcry_mpih_lshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
 mpi_limb_t _gcry_mpih_rshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
 							   unsigned cnt);
 
+/*-- mpih-const-time.c --*/
+#define mpih_set_cond(w,u,s,o) _gcry_mpih_set_cond ((w),(u),(s),(o))
+#define mpih_add_n_cond(w,u,v,s,o) _gcry_mpih_add_n_cond ((w),(u),(v),(s),(o))
+#define mpih_sub_n_cond(w,u,v,s,o) _gcry_mpih_sub_n_cond ((w),(u),(v),(s),(o))
+#define mpih_swap_cond(u,v,s,o) _gcry_mpih_swap_cond ((u),(v),(s),(o))
+#define mpih_abs_cond(w,u,s,o) _gcry_mpih_abs_cond ((w),(u),(s),(o))
+#define mpih_mod(v,vs,u,us) _gcry_mpih_mod ((v),(vs),(u),(us))
+
+DEFINE_CT_TYPE_GEN_MASK(limb, mpi_limb_t)
+DEFINE_CT_TYPE_GEN_INV_MASK(limb, mpi_limb_t)
+
+static inline int
+mpih_limb_is_zero (mpi_limb_t a)
+{
+  /* Sign bit set if A == 0. */
+  a = ~a & ~(-a);
+
+  return a >> (BITS_PER_MPI_LIMB - 1);
+}
+
+static inline int
+mpih_limb_is_not_zero (mpi_limb_t a)
+{
+  /* Sign bit set if A != 0. */
+  a = a | (-a);
+
+  return a >> (BITS_PER_MPI_LIMB - 1);
+}
+
+void _gcry_mpih_set_cond (mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
+                          unsigned long op_enable);
+mpi_limb_t _gcry_mpih_add_n_cond (mpi_ptr_t wp, mpi_ptr_t up, mpi_ptr_t vp,
+                                  mpi_size_t usize, unsigned long op_enable);
+mpi_limb_t _gcry_mpih_sub_n_cond (mpi_ptr_t wp, mpi_ptr_t up, mpi_ptr_t vp,
+                                  mpi_size_t usize, unsigned long op_enable);
+void _gcry_mpih_swap_cond (mpi_ptr_t up, mpi_ptr_t vp, mpi_size_t usize,
+                           unsigned long op_enable);
+void _gcry_mpih_abs_cond (mpi_ptr_t wp, mpi_ptr_t up,
+                          mpi_size_t usize, unsigned long op_enable);
+mpi_ptr_t _gcry_mpih_mod (mpi_ptr_t vp, mpi_size_t vsize,
+                          mpi_ptr_t up, mpi_size_t usize);
+int _gcry_mpih_cmp_ui (mpi_ptr_t up, mpi_size_t usize, unsigned long v);
+
 
 /* Define stuff for longlong.h.  */
 #define W_TYPE_SIZE BITS_PER_MPI_LIMB